to presidents to why certain laws came into play. at very different levels, there are certain questions that are asked. the 8th graders really were the ones who did, i would say, perform the best when we consider the 4th and we consider the 12th grade. >> that's because 8th graders' scores improved over the last time the test was given. 4th graders and 12th graders did not. in fact, a majority of 12th graders turned in a poor performance. their questions were harder, and their correct answers were fewer. 55% of 12th graders scored below the basic level. what does this show? >> mm, lauren, that's not good news at all. [ chuckles ] and what does that mean for our 12th graders? it means that we have to find a way to engage our 12th graders in learning u.s. history. we have to make it more important to them. so, we have a lot of work to do, definitely, at the 12th-grade level. >> there's a famous saying -- "those who don't know history are condemned to repeat it." so, the lessons of the past are worth learning. for "teen kids news," i'm lauren. >> there's still lots ahead, so stay with us.